Hollywood cast reunions

"Back to the Future"

Musician Huey Lewis and actors Michael J. Fox, Christopher Lloyd and Lea Thompson attend the Back to the Future 30th Anniversary screening in New York, Oct. 21, 2015. The film franchise celebrated -- as in the first sequel -- "Back to the Future II" -- the main characters traveled through time to Oct. 21, 2015.

Credit: Andrew Kelly/Reuters

"Downton Abbey"

Dan Stevens and Michelle Dockery, who played "Downton Abbey" couple Matthew and Mary Crawley, reunited at a special BAFTAs event in Richmond, England, in August 2015.

Dockery posted this pic on Instagram, along with the caption: "Reunited. I've missed this face." Stevens also posted the shot, writing, "Me & M'Lady together again..."

"Buffy the Vampire Slayer"

Former "Buffy the Vampire Slayer" co-stars stars Alyson Hannigan, left, and Sarah Michelle Gellar pose for a photo at a May 2015 party thrown by Hannigan. "This girl and her husband [Alexis Denisof] know how to throw a party," Gellar captioned the Instagram photo.

Credit: Sarah Michelle Gellar/Instagram

"The Way We Were"

Honoree Robert Redford and Barbra Streisand speak onstage at the 42nd Chaplin Award Gala at Alice Tully Hall, Lincoln Center on April 27, 2015, in New York.

Credit: Getty Images

"Goodfellas"

From left, writer Nicholas Pileggi, actors Ray Liotta, Lorraine Bracco, Robert De Niro, Paul Sorvino and moderator Jon Stewart participate in a panel at a screening of the film "Goodfellas" during the Tribeca Film Festival in New York on April 25, 2015.

Credit: REUTERS/Eric Thayer

"Pretty Woman"

The stars of "Pretty Woman" (from left, Hector Elizondo, Laura San Giacomo, director Garry Marshall, Julia Roberts and Richard Gere) pose with NBC's Matt Lauer, center, during a reunion on the "Today" show marking the film's 25th anniversary in March 2015.

"Dawson's Creek"

Joshua Jackson and James Van Der Beek of "Dawson's Creek" fame were spotted together in November 2014. Van Der Beek posted this pic on Instagram with the caption: "The most pleasant run-ins can happen in the most unexpected places..."

"D2: The Mighty Ducks"

Cast members from the 1994 sequel "D2: The Mighty Ducks" reunited on Sept. 22, 2014, to mark the 20th anniversary of the film's release.

Credit: Instagram

"7th Heaven"

"7th Heaven" stars David Gallagher, Beverley Mitchell, Stephen Collins, Jessica Biel, Barry Watson and Catherine Hicks got together for a Camden family reunion (mins Mackenzie Rosman, who played Ruthie). "Love these peeps more than I can ever explain!" Mitchell captioned the photo, posted on her WhoSay page.

"Sisterhood of the Traveling Pants"

The stars of "The Sisterhood of the Traveling Pants" -- Blake Lively, Alexis Bledel, America Ferrera and Amber Tamblyn -- were all smiles as they snapped a selfie at a recent get together. Tamblyn posted the photo to Instagram on Sept. 15, 2014, captioning it, "Brunch with my best b******. #sisterhood."

Keep clicking to see other reunions of stars from your favorite movies and TV shows.

Credit: Amber Tamblyn/Instagram

"Married with Children"

Actress Katey Sagal poses with actress Christina Applegate and actors David Faustino and Ed O'Neill on her star after it was unveiled on the Walk of Fame in Hollywood, California Sept. 9, 2014. They starred in "Married with Children, which aired from 1987-1997 on Fox.

Credit: Reuters

"Thelma & Louise"

"Thelma & Louise" stars Susan Sarandon and Geena Davis got together for a modern-day update to the famous photo they look in the 1991 film. Sarandon tweeted the photo on June 19, 2014, writing, "Inventors of the #selfie at it again."

Credit: Susan Sarandon/Twitter

"Blossom"

The stars of "Blossom" (from left, Michael Stoyanov, Mayim Bialik, Joey Lawrence and Jenna von Oy) reunited in June 2014 for a photo shoot marking their hit sitcom's return to TV on the Hub Network. "We still look like young whippersnappers," Bialik said on Twitter.

"Jersey Shore"

The ladies of "Jersey Shore" -- from left, Samantha "Sammi" Giancola, Jenni "JWoww" Farley, Nicole "Snooki" Polizzi and Deena Cortese -- posed together for this photo at Farley's baby shower in June 2014.

Credit: Snooki/Instagram

"The Wonder Years"

"The Wonder Years" stars Fred Savage, Dan Lauria, Alley Mills, Olivia d'Abo, Jason Hervey, Danica McKellar and Josh Saviano got together in May 2014 to film interviews for the show's new DVD release. Savage shared this photo from the reunion on Twitter.

"Law & Order: Special Victims Unit"

Benson and Stabler, together again. "Checking in with @therealmariskahargitay. #NYC#partners4life," Chris Meloni wrote on Instagram, sharing this photo of him with his former "SVU" co-star Mariska Hargitay in March 2014.

Credit: Chris Meloni/Instagram

"Boy Meets World"

Corey and Topanga will be back on the small screen together in Disney's "Boy Meets World" spin-off, "Girl Meets World," but Ben Savage and Danielle Fishel have also been spending time together off-set -- like in this red carpet photo Fishel shared in March 2014. "Thank you for always supporting me, @bensavage," she wrote.

Credit: Danielle Fishel/Instagram

"Mean Girls"

How fetch is this? Lindsay Lohan shared this photo of her and "Mean Girls" co-star Daniel Franzese on Instagram in February 2014. Franzese also shared the photo with a "Mean Girls"-approrpiate caption: "You can't sit with us!"

"Buffy the Vampire Slayer"

A mini "Buffy the Vampire Slayer" reunion happened in February 2014 when Michelle Trachtenberg and Seth Green visited Sarah Michelle Gellar on the set of her show "The Crazy Ones." "I get the best visitors," Gellar tweeted.

Credit: Sarah Michelle Gellar/Twitter

"Mary Poppins"

Julie Andrews and Dick Van Dyke attend the premiere of Disney's "Saving Mr. Banks," the story of how their classic film "Mary Poppins" made it to the screen, at the Walt Disney Studios on Dec. 9, 2013, in Burbank, Calif.

"Malcolm in the Middle"

The cast of "Malcolm in the Middle" got together for a family reunion in 2012, and Frankie Muniz shared photos of the get-together on Instagram. This photo shows Muniz with his on-screen parents (who were played by Jane Kaczmarek and Bryan Cranston) and siblings (Christopher Masterson and Justin Berfield. Berfield is holding up a photo of Erik Per Sullivan, who played youngest brother Dewey).